Screw-threading device.



No. 66!,597. Patented Nov. l3, I900.

m BEHRENS SCREW THREADING DEVICE. (Applicatioli fllqd Mar. 24, 1699.

(No Model.)

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(9/ MWX Attorney;

UNITED STATES PATENT OFFICE.

MARTIN BEI-IRENS, OF APPLETON, WISCONSIN.

SCREW-TH READING DEVICE.

SPECIFICATION forming part of Letters Patent No. 661,597, dated November13, 1900.

Application filed. March 24, 1899.

To ctZZ whom, it may concern:

Be it known that I, MARTIN BEHRENs, a citizen of the United States,residing at Appleton, in the county of Outagamie and State of Wisconsin,have invented new and useful Improvements in Screw-Threading Devices, ofwhich the following is a specification.

My invention relates to improvements in pipe-cutting and screw-threadingdevices.

The object of my invention is to provide a device which can be usedinterchangeably for cutting pipes and for threading pipes and nipples.

In the following description reference is had to the accompanyingdrawings, in which- Figure 1 is a side elevation with parts broken awayto show the interior construction, both die-holders being shown in aposition for use, but without threading-dies, and the pipe beingpartially inserted through the vise and the die-holder supported thereonin order to indicate the position occupied by the pipe. Fig. 2 is anelevation of the end provided with the rotary die-holder. Fig. 3 is atop view of the vise. Fig. 4 is a horizontal sectional view of the visedrawn on line a: so of Fig. 1. Fig. 5 is a sectional view drawn on liney y of Fig. 1. Figs. 6 and 7 are front and side views, respectively, ofthe pipe-cutter. Fig. 8 is a face view of the rotary die, illustratingthe use of a jam-collar.

Like parts are identified by the same reference-letters throughout theseveral views.

A is a bed from which the parts of my machine are supported.

13 is a die-frame provided with a dovetailed base I), slidably engagedin a corresponding channel in the bed. The outer end ofthe base I) isrecessed for the reception of an adjusting-block b, which is engaged bythe adjust ing-screw a, the latter being secured in suitable bearings aat the other end of the bed. By turning the screw in the block b thevise may be drawn toward the opposite end of the bed in an obviousmanner.

Referring to the construction of the vise itself, it will be observed,Fig. 5, that it is provided with oppositely-disposed jaws O C, removablylocated in screw-blocks O, which are supported upon right and leftscrewthreaded shafts D, so that by turning the shafts D the jaws ,O 0will be simultaneously serial. No. 710,315. @110 m del.)

adjusted away from or toward each other. The shafts are actuated bymeans of a handwheel E, the motion of which is communicated to theshafts and jaws through the shank e, gear-wheel e, and shaft gear-wheelsd. The vise-frame is also provided with a removable die-frame F, thepurpose of which is hereinafter more fully explained. The frame F isprovided with angular supporting-arms f, which are adapted to slidablyengage projecting guides G at the sides of the vise-frame B, the arms)being adapted to bear upon the shoulders g at the lower ends of theguides G.

At the opposite end of the bed from that at which the vise is located Ihave provided a rotary die-holder, of which H is the supporting-frame,rigidly mounted upon the bed. I is a hollow shaft rotatably mounted inthe frame and actuated by means of a crank or lever applied to the shaftJ, from which mo tion is communicated to the shaft I through thegear-wheels j and K, the latter being keyed to the shaft I. Thegear-wheel j is preferably arranged to communicate its motion to thelarge gear-wheel K, through the gears M and M',-in addition to itsdirect engagement, the object of this construction being to relieve thestrain which the individual teeth would be subjected to if but asinglegearwheel were used; but where light duty is required the shaft Imay be actuated directly by means of a lever L inserted through it, asillustrated in Figv 1. 7

It will be observed that the shaft I carries a rotary die-frame N, whichis held thereby in a position opposite to the stationary dieframe F,supported by the vise B. The frames F and N are adapted to receive anyordinary form of die either of the integral or adj ustabletype.

Referring now to the pipe-cutter, (shown in Figs. 6 and 7,) it will beobserved that the frame 0 is provided with offset arms P, adapted toengage the edges of the die-frame, to which it is secured by means ofbolts P. The pipe is engaged between a cutting-wheel Q andbearing-roller R R, mounted, respectively, in oppositely-disposedhead-blocks S and adjusted by means of screws T, swiveled to thehead-blocks. i The pipe being held by the vise, the rotary die-holderturns the frame 0 and carries the cutting-wheel transversely around thepipe, the screws T being adjusted at intervals to correspond with thedepth of the cut.

When my device is used for screw-threading pipes in the ordinary manner,the stalionary die-frame F is usually removed and the pipe insertedbetween thegripping-jaws of the vise, the latter being then moved towardthe rotary die-holder until the end of the pipe enters the die-frame.The vise is then adjusted by means'of the screw (1 until the end of thepipe is brought into forcible contact with the die, when" the die-holderis rotated, as above explained, to cut the threads.

For threading nipples, however, I replace the stationary die-frame F,and in. the rear of the dies N in the frames F and N, I place ajam-collar U, of such size as to engage the ends of the nipple, a rod orsmaller pipe being preferably inserted through the nipple to reinforceit. The vise being drawn up to bring the nipple into contact withvbothdies, and the nipple being forced into such cone tact by the screw a,the rotary die-holder is turned to cut the threads as above described.It is obvious that if the nipple turns it will be, threaded by thestationary die and that if it remains stationary it will be threaded bythe rotary die, but that in either case it will on reaching thejam-collar behindeither die become fixed in such die, and the oppos--.ing die will then operate to thread the other end of the nipple. Theshort pieces notbeing engaged by the vise are free to either turn. with.the rotary: die or to be held by the-stationary die. Whether the pipewill turn on not depends, therefore, upon the resistance encountered bythe respective dies,

, Forcut'ting right and left threads the pipesection is engaged'eitherby the vise or he,- tweeIi't-hedies and the thread cut on one end 1 Thisdie is then removed and an oppositely-formed die inserted, when thepipe-section is reversed in position and.

"slides freely in the bed.

serted in the stationary die and held therein by a pipe-wrench while therotary die is being turned in: the oppositedirection.

It will be observed that as soon as the pipe is, engagedby the die ofthe rotary die-holder the progressive movement of the die will draw thevise forwardly independently of and away from the screw-block b,.as thevise It is therefore not necessary to: actuate. the screw (2, except tobring the pipe into forcible engagement with the die.

Havingthus described my invention, what I claim as new, and desire tosecure byLetters Patent, is.

1. llhe combination of bed; a pipe-holding viseslidably mounted therein;an adjusting-screw mounted in the bed and extending through. anaperture, in the base of the pipeholding vise; a feed-nut screw-blockengaged by said screw in the rear of the vise; and a rotary die-holdermounted'on said bed and adapted to cooperate with the vise; togetherwith a die-holder provided with supportingarmsadapted to removablyengage the frame of the vise.

2. The combination of a bed; apipe-holding vise slidabl-y mount-ed.therein; a dieholder provided with supporting-arms adapt: ed toremovably engage the frame of the vise; and. a rotary die-holder mountedon. the bed in cooperative relation with the'vise and the removabledie-lolder supported thereby; together with means for adjusting the viselongitudinally of the bed.

In testimony whereof I affix my signature in the presence of twowitnesses.

MARTIN B'EHRENS. Witnesses-z MALCOLM McCoy, AUGUST RUHLANDER.

